A dyno graph a day vol 1
Discussion
spareparts said:
Hence why I think the before/after plot is far more interesting than a straight plot. The delta is what you experience!
ahhh, but that's kinda the issue. The DJHP numbers actually skew at a greater percentage as the BHP goes up. So they don't maintain a constant value against true bhp but actually the delta starts climbing away. And i recently discovered a problem with the way DJ dynos measure and map using the sweep method that resulted in me ditching the pcv as the dyno tune was actually way off what the motor needed in the real world. .....
bass gt3 said:
ahhh, but that's kinda the issue. The DJHP numbers actually skew at a greater percentage as the BHP goes up. So they don't maintain a constant value against true bhp but actually the delta starts climbing away.
And i recently discovered a problem with the way DJ dynos measure and map using the sweep method that resulted in me ditching the pcv as the dyno tune was actually way off what the motor needed in the real world. .....
See other thread... And i recently discovered a problem with the way DJ dynos measure and map using the sweep method that resulted in me ditching the pcv as the dyno tune was actually way off what the motor needed in the real world. .....
Anyway, dynos are fun. Who's ever not had a good time on a dyno day! (cue picture of bikes blowing up...) They are a good referential for you and your mates on the same day to willy wave at each other. Or use as a beating stick to the tuner for not giving you the results they promised...
spareparts said:
See other thread...
Anyway, dynos are fun. Who's ever not had a good time on a dyno day! (cue picture of bikes blowing up...) They are a good referential for you and your mates on the same day to willy wave at each other. Or use as a beating stick to the tuner for not giving you the results they promised...
Ade, my issue isn't with Dyno's per se, rather the DynoJet dyno and he sweep test method of testing. As for using it as a stick against a tuner who's not delivered, I would suspect the opposite is more likely, where a canny operator can demonstrate mythical HP that he's not actually delivered.Anyway, dynos are fun. Who's ever not had a good time on a dyno day! (cue picture of bikes blowing up...) They are a good referential for you and your mates on the same day to willy wave at each other. Or use as a beating stick to the tuner for not giving you the results they promised...
You wouldn't be so forgiving if supermarkets sold you a kilo or a litre of anything that was actually 750 whatevers.
If you can't " beat them" .....
2009 Aprilia RSV4, standard and then with AR link pipe and end can, BMC filter....pretty poor numbers in some peoples' money, but as much discussed , one of the best riding experiences you can have,remember , a big axe sometimes needs a very big room to swing it in .......
Ps : Dynojet....
2009 Aprilia RSV4, standard and then with AR link pipe and end can, BMC filter....pretty poor numbers in some peoples' money, but as much discussed , one of the best riding experiences you can have,remember , a big axe sometimes needs a very big room to swing it in .......
Ps : Dynojet....
A mate over from IOM getting KTM Superduke R 1290 set up to Austin Racing end can on Powertech (Poulton, Fylde) dyno to smooth it out and reduce risk of lean running yesterday, the single loudest bike I have ever been in a confined space with on full throttle . Manufacturer's figures are 180+ peak for these, Jason ( well experienced ) guessed at a true possible 155... It is 157 at the rear.
His play tool of choice for Cartagena. I shall be in the next door garage......
Edit: apologies - he didn't bother getting graph printed off so can't post , as the number wasn't the object of the exercise....
Edited by hebegb on Sunday 8th February 10:36
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